WU U shape rims are specially designed for rim brake system, together with aerodynamic design, making it a greatd weapon for climbing racing or flat racing or everyday riding.
The highlight features as following:
1-Special high temperature 255 degree resin system provides more consistent modulation while dissipating extremely high temprature from braking.
2-Aerodynamically optimized with 25mm width tire, also no problems for tires range from 23-28mm width.
3-Painstakingly optimized tire bed design allows you mount tires in ease
4-Tubes or most tubeless road tires on the market work well with this rim.